diff --git a/qiniu/rs.php b/qiniu/rs.php
index beb5031f..db79caa3 100644
--- a/qiniu/rs.php
+++ b/qiniu/rs.php
@@ -41,14 +41,18 @@ function Qiniu_RS_MakeBaseUrl($domain, $key) // => $baseUrl
 
 class Qiniu_RS_PutPolicy
 {
-	public $Scope;
+	public $Scope;                  //必填
+	public $Expires;                //默认为3600s
 	public $CallbackUrl;
 	public $CallbackBody;
 	public $ReturnUrl;
 	public $ReturnBody;
 	public $AsyncOps;
 	public $EndUser;
-	public $Expires;
+	public $InsertOnly;             //若非0，则任何情况下无法覆盖上传
+	public $DetectMime;             //若非0，则服务端根据内容自动确定MimeType
+	public $FsizeLimit;
+	public $SaveKey;
 	public $PersistentOps;
 	public $PersistentNotifyUrl;
 
@@ -84,6 +88,18 @@ public function Token($mac) // => $token
 		if (!empty($this->EndUser)) {
 			$policy['endUser'] = $this->EndUser;
 		}
+		if (!empty($this->InsertOnly)) {
+			$policy['exclusive'] = $this->InsertOnly;
+		}
+		if (!empty($this->DetectMime)) {
+			$policy['detectMime'] = $this->DetectMime;
+		}
+		if (!empty($this->FsizeLimit)) {
+			$policy['fsizeLimit'] = $this->FsizeLimit;
+		}
+		if (!empty($this->SaveKey)) {
+			$policy['saveKey'] = $this->SaveKey;
+		}
 		if (!empty($this->PersistentOps)) {
 			$policy['persistentOps'] = $this->PersistentOps;
 		}
diff --git a/tests/IoTest.php b/tests/IoTest.php
index 18f29065..16d04f71 100644
--- a/tests/IoTest.php
+++ b/tests/IoTest.php
@@ -55,5 +55,68 @@ public function testPut()
 		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
 		$this->assertNull($err);
 	}
+
+	public function testPut_sizelimit()
+	{
+		$key = 'testPut_sizelimit' . getTid();
+		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
+
+		$putPolicy = new Qiniu_RS_PutPolicy($this->bucket);
+		$putPolicy->FsizeLimit = 1;
+		$upToken = $putPolicy->Token(null);
+		list($ret, $err) = Qiniu_Put($upToken, $key, "hello world!", null);
+		$this->assertNull($ret);
+		$this->assertEquals($err->Err, 'exceed FsizeLimit');
+		var_dump($err);
+	}
+
+	public function testPut_mime_save()
+	{
+		$key = 'testPut_mime_save' . getTid();
+		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
+
+		$putPolicy = new Qiniu_RS_PutPolicy($this->bucket);
+		$putPolicy->DetectMime = 1;
+		$putPolicy->SaveKey = $key;
+		$upToken = $putPolicy->Token(null);
+		$putExtra = new Qiniu_PutExtra();
+		$putExtra->MimeType = 'image/jpg';
+		list($ret, $err) = Qiniu_PutFile($upToken, null, __file__, $putExtra);
+		$this->assertNull($err);
+
+		list($ret, $err) = Qiniu_RS_Stat($this->client, $this->bucket, $key);
+		$this->assertNull($err);
+		$this->assertEquals($ret['mimeType'], 'application/x-httpd-php');
+		var_dump($ret);
+
+		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
+		$this->assertNull($err);
+	}
+
+	public function testPut_exclusive()
+	{
+		$key = 'testPut_exclusive' . getTid();
+		$scope = $this->bucket . ':' . $key;
+		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
+
+		$putPolicy = new Qiniu_RS_PutPolicy($scope);
+		$putPolicy->InsertOnly = 1;
+		$upToken = $putPolicy->Token(null);
+
+		list($ret, $err) = Qiniu_Put($upToken, $key, "hello world!", null);
+		$this->assertNull($err);
+		list($ret, $err) = Qiniu_PutFile($upToken, $key, __file__, null);
+		$this->assertNull($ret);
+		$this->assertEquals($err->Err, 'file exists');
+		var_dump($err);
+
+		list($ret, $err) = Qiniu_RS_Stat($this->client, $this->bucket, $key);
+		$this->assertNull($err);
+		$this->assertEquals($ret['mimeType'], 'application/octet-stream');
+		var_dump($ret);
+
+		$err = Qiniu_RS_Delete($this->client, $this->bucket, $key);
+		$this->assertNull($err);
+	}
 }